# News tagged with heat

## In 27 U.S. states, utilities can shut off electricity for nonpayment, even in a heat wave

Coast to coast, millions of Americans are experiencing sweltering temperatures this summer, with seemingly little relief in sight. For people who struggle to access or afford air conditioning, the rising need for cooling ...

## Capturing carbon with energy-efficient sodium carbonate−nanocarbon hybrid material

Industrial emissions are one of the main sources of climate change-inducing carbon dioxide (CO2). While adopting renewable and clean energy alternatives is one option for mitigating these carbon emissions, carbon capture ...

## Video: Producing heat energy from captured carbon

A geotechnical engineering team led by Rick Chalaturnyk in the University of Alberta's Faculty of Engineering has teamed up with Alberta's first conventional geothermal power project to explore how to use carbon dioxide instead ...

## Heat

In physics and thermodynamics, heat is the process of energy transfer from one body or system to another due to a difference in temperature. In thermodynamics, the quantity TdS is used as a representative measure of the (inexact) heat differential δQ, which is the absolute temperature of an object multiplied by the differential quantity of a system's entropy measured at the boundary of the object.

A related term is thermal energy, loosely defined as the energy of a body that increases with its temperature. Heat is also loosely referred to as thermal energy, although many definitions require this thermal energy to actually be in the process of movement between one body and another to be technically called heat (otherwise, many sources prefer to continue to refer to the static quantity as "thermal energy"). Heat is also known as "Energy".

Energy transfer by heat can occur between objects by radiation, conduction and convection. Temperature is used as a measure of the internal energy or enthalpy, that is the level of elementary motion giving rise to heat transfer. Energy can only be transferred by heat between objects - or areas within an object - with different temperatures (as given by the zeroth law of thermodynamics). This transfer happens spontaneously only in the direction of the colder body (as per the second law of thermodynamics). The transfer of energy by heat from one object to another object with an equal or higher temperature can happen only with the aid of a heat pump, which does work.

This text uses material from Wikipedia, licensed under CC BY-SA